Bad service from Taxify

I requested a driver for my friend and the payment option was by card, when she reached the drop off location the driver made her pay cash and the money was deducted from my account. I called the driver and he told me to contact the head office and ask for a refund, the worst thing is there is No Working telephone number where we can get hold of someone this is bull**** that i cannot tolerate. there is only an email address which i have sent numerous emails to with my response.